Smoking crack after speedball

RenEH01 · 2905

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Offline RenEH01

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Reply #15 on: December 04, 2022, 06:44:40 PM
I haven’t have plugged it in yet, but I went over ever single solder point again and I noticed A6 and A7 could have intermittently touched after the nylon washer was installed. The solder tabs technically had enough give they could have touched, but there was no continuity when I checked it.  I cleaned it up and will hope for no smoke in the morning with fresh eyes.


Offline Paul Birkeland

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Reply #16 on: December 05, 2022, 04:09:32 AM
A6 and A7 touching won't cause the kind of mayhem you're experiencing.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline RenEH01

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Reply #17 on: December 05, 2022, 06:15:06 AM
I tried to run the amp for 5 minutes with no tubes and it had no issues after 5 minutes. Transformer was cool and belll cap was also cool after 5 minutes. I had no headphones or dac plugged in when this was attempted.

Should I give it a try running it with tubes?


Offline Paul Birkeland

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Reply #18 on: December 05, 2022, 06:38:02 AM
Repeat the experiment with just the 12AU7.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline RenEH01

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Reply #19 on: December 05, 2022, 06:51:33 AM
Experiment passed with just the 12au7. I used the stock tube. I think it’s an RCA clear top, I’m not sure, but it lit up nicely


Offline RenEH01

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Reply #20 on: December 05, 2022, 07:47:14 AM
Please note that the speedball LED's did not light up with no power tube. I don't know if this is normal or not.


Offline Paul Birkeland

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Reply #21 on: December 05, 2022, 11:22:54 AM
Can you check the voltages on the front board with just the 12AU7 plugged in?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline RenEH01

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Reply #22 on: December 05, 2022, 07:08:54 PM
80V, 212V, 0.007V, 80V and 212V


Offline Paul Birkeland

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Reply #23 on: December 05, 2022, 07:19:39 PM
Can you pop the 4 wires off the big PC board and post a pic of the bottom?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline RenEH01

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Reply #24 on: December 05, 2022, 07:33:39 PM
Sorry I messed up the order. Voltage is symmetrical. This was using the stock tube. From left to right 80V, 212V, 0.007V, 212V and 80V.


Offline RenEH01

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Reply #25 on: December 05, 2022, 07:34:39 PM
Ok.


Offline RenEH01

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Reply #26 on: December 05, 2022, 08:42:22 PM
Please see attached.


Offline Paul Birkeland

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Reply #27 on: December 06, 2022, 04:11:23 AM
Can you try the 6080 we provided now?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline RenEH01

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Reply #28 on: December 06, 2022, 06:29:38 AM
No smoke with power tube :) tried my 12au7 and cv4003. Is this safe to use then?


Offline Paul Birkeland

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Reply #29 on: December 06, 2022, 06:35:49 AM
I think you may just have an issue with the other 6080 you have.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

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